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URL: https://oeis.org/A202562

⇱ A202562 - OEIS

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A202562
Carmichael numbers whose prime factors do not divide any smaller Carmichael number.
2
561, 84350561, 851703301, 2436691321, 34138047673, 60246018673, 63280622521, 83946864769, 110296864801, 114919915021, 155999871721, 225593397919, 342267565249, 534919693681, 660950414671, 733547013841, 1079942171239, 1301203515361, 1333189866793
OFFSET
1,1
COMMENTS
Note that all terms so far have only three prime factors.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000 (calculated using data from Claude Goutier; terms 1..1377, terms below 10^18, from Donovan Johnson)
Eric Weisstein's World of Mathematics, Carmichael Number.
EXAMPLE
a(2) = 84350561 because 84350561 = 107*743*1061 and the smaller Carmichael numbers do not have the factors 107, 743 or 1061.
CROSSREFS
Sequence in context: A371759 A213867 A139089 * A252352 A252345 A121508
KEYWORD
nonn
AUTHOR
STATUS
approved